Space

Universe may hold three times as many stars as thought

Venus data warns against geoengineering, says ESA

Scientist explains away UFO sightings

Secret spaceplane set to land next weekend

Scientist finds evidence of pre-Big Bang events

Cassini finds oxygen atmosphere around Saturnian moon

Astronauts back safely from ISS

Russia eyes nuclear-powered spaceships

Discovery launch may be postponed to next year

SpaceX wins approval for first commercial spacecraft re-entry